How to install free SSL certificate on Your server by virtualmin?

Let’s Encrypt?

Let’s Encrypt is an initiative run by the Internet Security Research Group (ISRG).
Free and open certificate authority recognized by all major browsers, such Chrome, Mozilla’s Firefox and Microsoft’s Internet Explorer.

Menu

Server Configuration -> Manage SSL Certificate

In Tab Let’scrypt, ‘Request Certificate ‘on the bottom (white button)

Done.

Now You can find more details about created certificate in Browser:

Let’s Encrypt is a new Certificate Authority: It’s free, automated, and open.